Sans and Gaster cause why not-

Undertale and Underfell sans + OW sprites

Undertale - sans | version 3

Frisk

[Megalovania]

[undertale] the undermen

Dusted Maddness

Sudden Changes

Muffet - Day 2 #Joltober25 #Spider

sands the skeleton - Big thanks for @Danhx for making the animation go and follow him.